Naturally detoxifies, cleanses, and absorbs excess water from its porous pieces. Acts as a filter and also retains moisture while removing excess moisture for your plants. Espoma Organic Charcoal is an all-natural carbon material that can help improve soils. It is produced by heating untreated hardwoods to very high temperatures without oxygen in a process called pyrolysis. The result is an excellent soil conditioner for improving potting mixes and adding better drainage in containers.